MCC Panel

A motor control centre (MCC) groups the starters and protection for many motors into one assembly, fed from a common busbar. Digital Controls designs and builds MCC panels with ABB switchgear, softstarters and drives for process plants, utilities and OEM skids.

What goes into our MCCs

• Incomer with ACB or MCCB, metering and protection relays.
• Horizontal and vertical busbars sized for the rated and short-circuit current.
• Motor feeders: DOL, star-delta, softstarter (ABB PSR/PSE/PSTX) or VFD (ABB ACS580/ACQ580/ACS880), each with MPCB or MCCB, contactors and overload protection.
• Control and indication: pushbuttons, lamps, local/remote selection, interlocks and PLC/SCADA interface.
• Cable alleys and gland plates for neat field termination.

Design choices to make early

• Fixed vs draw-out feeders: draw-out modules cut downtime for critical motors.
• Form of separation (e.g. Form 2, 3b or 4) to protect people working on live sections.
• Short-circuit rating matched to the transformer and fault level.
• Spare feeders (typically 10–20%) for future motors.
• Heat management when VFD feeders are included.

We design to IEC 61439 practices, carry out routine tests (insulation, functional, interlock) before dispatch, and support site installation and commissioning.